Electrical



No. 6l5,365. Patented Dec. 6, I898.

J. H. nosams.

ELECTRICAL APPLIANCE FOR ELEVATORS.

(Application filed Dec. 27, 1895.)

(No Model.) 4 Sheets-Sheet I.

m: Norms PETERS cow Puma-mam wAswmgnou. a c

' No. 65,365. Patented Dec. 6, I898.

J. H. ROBERTS.

ELECTBICALAPPLIANGE FOR ELEVATORS.

(Applicatio n filed Dec. 2'7. 1895.) (No Model.) 4 Sheets-Sheet 2.

cj) R By I A TTOR/VE Y mzmcmms PETERS co. wow-mum wAsnmcmw. I:v c

No. 6|5 ,365. Patented Dec. 6, I898.

- J. H. ROBERTS.

ELECTRICAL APPLIANCE FOR ELEVATORS,

(Application filed Dec. 27, 1895.)

4 Sheets-Sheet 3.

(No ModeL) I, b I G awn/70;?

ATTORNEY Tu: NDRFHS Pznms cov PHOTOUTHO, msumoron. o. z.

Patented Dec. 6, I898.

J. H. ROBERTS.

ELECTRICAL APPLIANCE FOR ELEVATORS.

(Application filed Dec. 27, 1895.)

4 Sheets-Sheet 4.

(No Model.)

INVENTOH W. 11 W WITNESSES A TTOHNEY.

THE "cams PETERS co. PHOYO-LITHQ, msumcn'on, n. c.

UNITED STATES PATENT OFFICE.

JAMES H. ROBERTS, OF GRAND RAPIDS, MICHIGAN.

ELECTRICAL APPLIANCE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 615,365, dated December6, 1898.

' Application filed December 27, 1895. Serial No. 573,536. (No model.)

To all whom it may concern.-

Be it known that I, JAMEs H. ROBERTS, a citizen of the United States,and a resident of Grand Rapids, in the county of Kent and State ofMichigan, have invented certain new and useful Improvements inElectrical Appliances for Elevators, of which the following is aspecification.

The invention relates to improvements in electrical appliances forelevators or other forms of hoisting or elevating apparatus; and itconsists, first, in the novel switches hereinafter described, timed withthe shaft of the winding drum or gearing operating the same or othermovable part of the apparatus and operable, preferably, by said part tobreak the electric circuit at such time as the elevator shall havereached the end of its line of travel, and thus automatically arrest themovement of the elevator at the terminus of its proper travel either onits ascent or descent, and, second, in the novel switches, alsohereinafter described, operable by the attendant in theelevator-carriage through the usual hand-rope or stopping and startingcable, whereby the elevator may be started and stopped at will by theattendant at any time. The starting and stopping cable is connectedthrough suitable gearing with a revoluble arm, by which the switchesforming the second part of my invention may be directly moved in eitherdirection and locked against accidental displacement, and these switchesare connected with the usual controller or rheostat in a manner whichwill be hereinafter pointed out. The controller in the combinationpresented performs its usual functions of offering resistance andaffording a convenient means of controlling the current and determiningthe direction of movement of the elevator, and it is operated from thestopping and starting cable simultaneously with the operation of theswitches forming the second part of my invention.

The switches constituting the first part of my invention are pivotallymounted on a switchboard and adapted to be independently operated by atraveler moving between them and actuated by a screw or other device,

whose motion is derived from some part of the hoistingmechanism-preferably the shaft of the drum or gearing which causes saiddrum to revolve-the part or parts actuating said switches being in timewith the hoisting mechanism, so that when the elevator reaches the upperend of its line of travel one of said switches will be moved and whenthe elevator reaches the lower end of its line of travel the other ofsaid switches will be moved, while when said switches are both relievedfrom said traveler, as while the carriage is in motion in eitherdirection, the said switches will be retained in their normal positionby suitably-placed springs and locking devices hereinafter described.The switches connected with the hoisting mechanism, or cutoff switches,as they may be called, are provided with means of adjustment and novelelevators constructed in accordance with and embodying the invention.Fig. 2 is an enlarged end view of a part of the switch and switchboardconnected with the controller.

Fig. 3 is a top view of same. Fig. at is a top view of the apparatusshown in Fig. 1, a part of the wheel operable by the starting andstopping cable being broken away to disclose the mechanism appearingdirectly below the same, and in this figure the follower timed with thehoisting mechanism is shown in practically its intermediate position,and the switches connected with the controller are shown in theirneutral position, this being the position they will have when moved bythe starting and stopping cable to stop the elevator-carriage at anypoint intermediate the ends of its travel. Fig. 5 is a top View, partlybroken away, of the switches connected with the controller andillustrating said switches as having been moved to the left from theirneutral position for the purpose of setting the carriage in motion, andthis figure also illustrates the manner of lockin g the arm by whichsaid switches are actuated, so that it will not permit any accidentaldisplacement of said switches. Fig. (3 is an enlarged transversesectional view through aportion of the switchboard for the switchesconnected with the hoisting mechanism and illustrates by full and dottedlines, respectively, the two positions of one of said switches. Fig. '7is an enlarged end View, partly broken away and partly in section, ofsame and illustrating more particularly the form of the contacts for theswitches. Fig. 8 is a detached top view, partly in section, of one setof the contacts present on each of the switch-arms of the switchesoperable from the hoisting mechanism. Fig. 9 is a detached sideelevation of one of the angular levers forming a part of the switchesoperable from the hoisting mechanism; and Fig. 10 is a diagrammatic viewof the motor, controller, and circuits.

In the drawings I have illustrated the switches, the wiring, andotherparts in a form adapted for a Crocker-lvheeler compoundwoundbrake-motor of well-known form and construction.

A indicates the usual winding-drum, B the customary worm-and-piniongearing for operating said drum, and C the shaft to which power isapplied for actuating said gearing from the compound-wound motor, whichis indicated in Fig. at by the reference-letter D.

The controllerisindicated by the referenceletter E and is of well-knownconstruction, being the Crocker -lVheeler railroad controller of theform and construction employed in connection with the Crocker-IVheelercompound-wound brake-motor.

The controller E and the stopping and starting switches operable inconnection therewith by the attendant in the carriage are illustrated intheir relative positions in Figs. 1 and 4:, in which it will be observedthat the usual stopping and starting wheel F is mounted above saidcontroller upon a vertical shaft G, which carries a pinion-wheel H, thelatter being in engagement with the gear- 1 wheel I, mounted directlyupon the vertical shaft J of the controller E, and which shaft carriesthe arm K, by which the stopping and starting switches are actuated, andhence it will be noted that the attendant in the car riage, through themedium of the stopping and starting cable, will actuate both theswitch-arm K and the controller E. The shaft G is mounted in a bracket Lof ordinary form and is strengthened by its connection with the casin gof the worm-and-pinion gearing by a brace M, as indicated in Fig. 1. Therelative proportions of the pinion II and gear.- wheel I are such thatwith a very small movement in the shaft G a rapid movement is attainedin the controller-shaft J, and hence with but a small movement of thestarting and stopping cable the actuating-arm K of the stopping andstarting switches and controller E are quickly given their fullmovement.

I will first describe the cut-off switches adjacent to the hoistingmechanism and operable therefrom, and in this connection it is to besaid that these switches shown in this specification embraceimprovementsupon the switches shown and described in Letters Patent of the UnitedStates, No. 537,856, granted to me April 23, 1895.

Upon the shaft of the hoisting-drum A is secured the gear-wheel N, whichengages the pinion-wheel 0 upon the end of the revoluble threaded shaftP, which is suitably mounted and has upon it the traveler Q, which isanalogous to the traveler upon the similarlythreaded shaft illustratedin the said Patent No. 537,856, with the exception that in the presentinstance the transverse bar R of said traveler has at each of its endsthe two actuating-pins, (lettered S T and V W, respectively,) asillustrated more clearly in Fig. 4, and the purpose of which will appearhereinafter. The threaded shaft P is adjacent to the switchboards X Y,which will preferably be of slate, and each of which has mounted insuitable bearings a the shafts Z) 0, both of the latter being adapted torevolve and each connected with a spring exerting a tension to turn theshafts outward from the center of the switchboards X Y. The shafts b care provided with the lateral arms (Z 6, which have hooked over them theupper ends of the rods f g, which extend downward through the slateswitchboards X Y and carry upon their lower portions below saidswitchboards the coiled springs h, whose lower ends bear upon theadjacent nuts 1, screwed upon the said rods f g. The relation of thespring 70, nut '5, slate switchboard Y, rod f, and arm (I is plainlyillustrated in Fig. 1, in which it will be observed that the pressure ofthe spring h is exerted to pull the rod f downward against the outer endof the arm d, and in this manner to turn the shaft 1) outward. Upon theshafts b c are secured the armsj 7.; Z and 'm n 0, respectively, saidarms extending inward from said shafts and being provided with collars pand set-screws g, by which they are adjustably secured upon the saidshafts. The arms j 7c Z and m n 0 correspond exactly with one another,and each has upon its inner end two pairs of contact-plates r s, whichextend downward and are adapted to receive between them the metalcontact-posts ta, respectively, as illustrated more clearly in Fig. 7.The pairs of plates 1' s are separated from the arms carrying them bymeans of the interposed layers of insulating material 0), as indicatedmore clearly in Fig. 8; but said pairs of plates 0" s are themselves inelectrical connection with each other through the bolts to, which passthrough but are insulated from the arm carrying the said pairs ofplates, as clearly illustrated in the left-hand portion of Fig. 8.

The relative proportions of the contactplates 0* s with thecontact-posts t u are illustrated in Fig. 6, in which it will beobserved that the posts t u are in the form of plates seated upon theslate contact-boards and that the plates 4" s are slit to facilitatespring action therein. The upper edges of the posts '6 u are tapered toan edge to facilitate their entrance between the pairs of plates 0' s,and

the latter are of spring metal, in order that they may yield outwardwhile passing downward upon the said posts and always maintain a firmcontact therewith. The posts in will be bolted or otherwise secured tothe slate contact-boards, and each of said posts is provided with thelug as, which is integral therewith and is in electrical connection withthe binding-post y, the latter entering an aperture in the slateswitchboards, as illustrated in Fig. 6, and being at its upper endsecured by the nut to the said lug x. The upper end of the binding-posty is threaded to receive said nut, and its lower end below the slateswitchboard is provided with the annular shoulder z, the latteroperating as a stop, and with the socket A, which receives the conductoror wire B, the latter being held in said socket by means of the screws 0or other convenient means. Each of the arms at m 0 and j Z carries twopairs of the contact-plates r s, and the switchboards 00 y are providedwith a pair of the contact-posts t 16 for the pairs of plates 0 .9,carried by each of the said arms on n 0 andj is Z, and each of thecontact-posts in is provided with a lug x and binding post y of theconstruction illustrated in Fig. 6. Each of the arms on n 0 andj 70 l isprovided with the collar 19 and securingscrew q, and each is therebyrendered adj ustable upon the shafts b c for the purpose of regulatingthe relation of the contact-plates r s with the contact-posts t u. Thecontactplates 0" 8, carried by the arms m a 0 j 7; Z, respectively, arenever all at one time free from the contact-posts t u, but are alwaysall in contact with the said posts when the follower Q is in theposition illustrated in Fig. 4 and the elevator-carriage is intermediatethe ends of its line of travel. At the termination of the travel of theelevator in one direction the contact-plates r .9, carried by the arms mn o, are elevated to break the circuit and automatically stop thecarriage, while the plates carried by the arms 70 Z remain in contactwith the said contactposts t u, and at the termination of the travel ofthe elevator in the other direction the contact-plates r 8, carried bythe arms j 76 Z, are elevated to break the circuit and stop thecarriage, while at this time the contact-plates carried by the arms m n0 are in their lower position, engaging their contact posts If u. Theaxial rotation of the shafts b o to elevate and depress, respectively,the arms j 70 Z and mac is accomplished by the follower Q,which travelsupon the threaded shaft P, the latter receiving its motion from thehoisting mechanism. Upon the outer ends of the shafts Z) c are securedthe plates D, upon the inner faces of which are arranged the angularleverarms E, and upon the outer faces of which are arranged the platesF. The lever-arms E have in their horizontal portion the elongated slotsG, (shown more clearly in Fig. 9,) through one of which passes the boltH,which retains the plates F and lever-arms E in position upon theplates D. The shafts b 0 pass through the elongated slots in theleverarms E, and hence the latter arms are permitted to have areciprocating movement to a limited extent upon the said plates D.Within one of the slots G in the plates E is placed a spring 1, whosetension is exerted to draw the lever-arms E inward toward the center ofthe switchboards XY. Adjacent to the inner ends of the lever-arms E aresecured upon the switchboards X Y the stops J, the form of which isillustrated more clearly in Fig. 7, and the purpose of which is toreceive beneath them the inner ends of the leverarms E, and therebyretain the contact-plates 'r .9, carried by the shafts b 0, connectedwith said arms, in their lower position, the stops J resisting thetension of the springs h to throw said contact-plates r s upward overthe contact-posts i M. Then the arms ma 0 and j 7; Z- are in theirhorizontal position, as shown in Fig. 4, the inner ends of thelever-arms E will be beneath the upper bent ends of the stops J, andsaid arms m n o andj 7t Zwill be retained in their horizontal positionuntil the pins S WV, carried by the follower Q, operate against thevertical portions of the lever-arms E to free the latter from the stopsJ and permit the springs 7b to throw said arms upward from thecontact-posts t a.

It may be assumed for purposes of explanation that the follower Q, istraveling toward the shaft bin Fig. at, and undersuch assumption the pinWV will gradually move toward the vertical portion of the lever-arm E,connected with said shaft, and its action will be to move the saidlever-arm longitudinally along the plate D until the inner end of saidlever-arm has slipped from under the stop or post J, at which time thespring 77,, being then unrestrained, will operate through the rod f andarm cl to turn the shaftb and throw the arms j 70 l upward, therebyfreeing the contact-plates r 5 carried by said arms from thecontact-posts t a. The plate D, being rigid with the shaft b, will underthe conditions named turn upward simultaneously with the arms j 70 Z andcarry with it the lever-arm E and plate F, and the latter during thismovement will have its shoulder K brought into near relation to the pinV, carried by the follower Q, the pins V \V at this time being betweenthe upright portion of the lever-arm E and the said shoulder K. Upon thereturn of the follower Q to the central part of the switchboards X Y ortoward the shaft 0 the pin V will come into contact with the shoulder Kof the plate F and depress the said plate and through it the plate D andlever-arm E, and thereby the shaft 1) will be turned inward and the armsj 70 Z will be depressed to their former horizontal position, the forceof the pinVagainst the shoulder K serving to overcome the tension of thespring 7L. During the inward travel of the pin V from the shaft Z) theinner inclined end of the lower portion of tho lever-arm E will movedownward against the stop J, the spring I yielding to permit of saidmovement, and when the said portion of the lever-arm E has passedslightly below the bent upper end of the stop J the spring I willproject the said lever-arm inward and cause its said inclined inner endto pass below the said stop J to its former position. The pin V will notpass over the shoulder K until the lower portion of the lever-arm E haspassed substantially below the stop J, and after the pin V has passedover the shoulder K the plate D and the parts connected with the samewill turn upward sufliciently for the inner end of the lever-arm E tocontact with the lower surface of the upper bent end of the stop J.During this latter movement the pairs of contact-plates r 3 carried bythe arms j is 1 pass downward upon the contact-posts t u and then slideupward slightly upon the same, the pairs of plates 1' s yielding topermit of this action, which is rendered necessary simply to enable thepin V to securely lock the lever-arm E below the stop J and then passinward with the follower Q. The pins V \V are utilized exclusively foroperating the shaft 1), and the pins S '1 are employed exclusively foroperating the shaft 0, and the operation of the pins S T is identicalwith that of the operation above specified for the pins V W, each of theshafts b c having the plate D, leverarm E, and plate F and each of theswitchboards X Y being provided with a stop J for contact with the lowerinner end of the lever-arm E. The action of the springs h upon theshafts b c is limited by the fact that the shoulders K of the plates Fascend into close relation to the pins V T of the follower Q and by thefurther fact that the rods fg, upon which the said springs h are placed,cannot descend when acting upon the arms d e farther than the arms L,through which they pass, will permit. In the Letters Patent granted tome April 23, 1895, No. 537,856, the follower carried but one pin at eachend instead of the two pins at each end, (shown in Fig. 4 of the presentapplication,) and hence the advantages of the inner pins V T are notpresent in the apparatus described and claimed in said patent. A furtheradvantage of the pins V T in the present application is that upon thereturn movement of the follower Q from the ends of the shaft P thedepression of the plates D upon the shafts b c is more quickly effectedthan could possibly be the case if the pins V T were omitted and thepins S W were compelled not only to effect the elevation of the plates Dand their connections, but also the depression of the same.

The switches hereinbefore described and located upon the switchboards XY are operated automatically by the follower Q from the hoistingmechanism and are only operated at the terminus of the travel of theelevator, one set of the arms on said boards X Y being elevated when theelevator has reached the upper end of its line of travel and the otherset of said arms being elevated when the elevator has reached the otherend of its line of travel. The switches upon the switchboards X Y serveto automatically break the circuit at the ends of the line of travel ofthe carriage, and thereby operate to automatically arrest the latter.The switch-arms l 0 on the switchboards X Y, with their connections,would be unnecessary in many instances and are employed in the presentapparatus because of the fact that the apparatus shown is adapted foruse in connection with the wellknown Croeker-lVheeler compound-woundbrake-motor, the connections from the switcharms Z 0 serving when saidarms Z0 are in their lower position to establish the circuit whichrenders active the magnet which holds the brake and when in their upperposition to break the circuit which includes said magnet, and therebyeffect the release of the brake from the magnet and its application bythe usual spring or weight to the motor to stop the latter. If theswitches and connections illustrated in connection with the switchboardsX Y were employed in connection with the apparatus referred to in theaforesaid Letters Patent No. 537,856 or in Letters Patent granted to meApril 23, 1895, No. 537,855, it would be unnecessary to employ theswitcharms Z 0 or their connections, and hence in this application I donot limit the invention to the use of any special number of switcharmson the shafts b c.

The second part of my invention pertains, as above described, to theswitches connected with the stopping and starting devices of theelevator and with the controller E, and this part of my invention ismore clearly illustrated in Figs. 1 to 5, inclusive. Upon the upper endof the casing for the controller E is provided the slate switchboard M,which has at its opposite side edges the plates N 0, there being in thisinstance three of the plates N at one edge of the board and three of theplates 0' at the other edge of the board. The plates N 0 correspond withone another and are directly opposite to each other and are providedwith the binding-posts P. The upper portions of the plates N O are abovethe slate board M, as illustrated more clearly in Fig. 1, and upon saidboard M, between each pair of the plates N O, is secured a trans verseplate Q, which at its ends is free of the plates N O, as indicated bydotted lines in Figs. 3 and 4t and full lines in Figs. 1 and 2.

Upon the switchboard M are secured the guides R, within which is placedthe bar S, connected with the arm T, the latter being integral with theoval locking-frame V,which incloses the actuatingarm K, hereinbeforedescribed as being secured upon the shaft J of the controller E. The armK is operated by the attendant in the carriage through the medium of thestopping and starting cable connected with the wheel F and the gearingintermediate such wheel and the shaft J, as above described.

Upon the arm T are secured the contactsprings a l), the outlines ofwhich are clearly illustrated in Figs. 2. and 3. The contact springs ctb are arranged in pairs and project correspondingly from both sides ofthe arm T, but are insulated from said arm, as shown in Fig. 2. Thelower contact-springs I) rest upon and move along the surface of theplates Q, secured to the switchboard M, and the contact-springs a attheir outer ends are substantially above the springs b and are adaptedfor contact with the lower surfaces of the upper inwardly-bent portionsofthe plates N 0 when the arm T is shifted to- Ward the right or leftover the switchboard M. When the arm T is in a neutral position, asillustrated in Fig. 4, the springs b- Will bein contact with the platesQ, and when the arm T is moved to the right, looking at Fig. 4, theright-hand ends of the springs a will pass below the upper bent ends ofthe plates N, while when said arm T is moved to the left the left-handends of the springs a will pass below the upper bent ends of the plates0, as shown in Fig. 5. \Vhen the arm T is in its neutral position, asillustrated in Fig. 4, the elevator-carriage will be at rest. When thearm T is moved to the right to bring the spring-plates Ct intoelectrical connection with the plates N, the car will ascend, and whenthe arm T is moved to the left, so as to bring the springplates a intoelectrical connection with the plates O,the carriage will descend. Thearm T has a positive reciprocating movement across the switchboard M,being guided in its movement by the bar S and guides R, and, as abovedescribed, the arm T receives its movement through the arm K, actingagainst the inner surface of the oval frame V. lVhen the shaft J isturned to move the arm K toward the left, as indicated in Fig. 5, thepressure of the roller at the outer end of said arm will drive the frameV to the left, and thereby cause the arm T and contactsprings a b tomove toward the left, as shown in Fig. 5, the carriage being therebycaused to descend. When it is desired to shift the arm T to a neutralposition, the arm K will be moved to a central position and the rollerat its outer end will reach the concavity d and come to a position inline with the length of the said arm T, as indicated in Fig. 4, and whenit is desired to shift the arm T,with its contact-springs a l), to theright the arm K will be turned to the right against the inner surface ofthe right-hand side of the frame V, thereby effecting the movement ofthe said frame and arm T to the right. When the arm K is moved either tothe right or left, it substantially occupies the diameter of the frame Vand locks the latter against accidental movement, and hence the arm K,in connection with the frame V, operates not only as a means forshifting the arm T, but also as a lock for securing the said arm in itsadjusted position. The arm K does not at any time make a completerevolution, but turns either to the left or right from the centerposition illustrated in Fig. 4, and the upper end of the controllerwithin the casing E is provided with a stop c, which prevents thecontroller-shaft J and arm K from having a complete revolving motion.The switch represented at the left-hand side of Fig. 4: and hereinbeforedescribed possesses three pairs of the spring-plates a b, and theswitchboard is provided with three pairs of the plates N O, and theseare essential in instances where the apparatus is to be used with thewell-known Orocker-lVheeler coinpound-wound brake-motor; but theinvention is not limited to any special number of the plates ct b andplates N O for the switchboard M, since if these starting and stoppingswitches were employed in connection with the rheostat illustrated inthe Letters Patent granted to me April 23, 1895, No. 537,855, it wouldbe unnecessary to employ more than two pairs of the contact-plates a band two pairs of the contact-plates N O, and for some classes ofelevator apparatus the said starting and stopping switches will be usedas described in the said patent and also in Letters Patent granted to meMarch 27, 1894, No. 517 ,169.

The wiring illustrated in Fig. & is that which will be followed when theapparatus is used in connection with the Orocker-VVheelerrailroad-controller and with the Crocker- VVheeler compound-woundbrake-motor, and in said figure f 9 represent the main line conductors,to which are connected the auxiliary conductors 71/1, the latter ofwhich extends to the conductor j, connecting the binding-posts of thecontact-posts t it for the contact-plates 0' 5, carried by the leverarmsand n. The conductor hpasses to the conductor 71;, which connects thebindingposts y for the contact-posts t it, which receive thecontact-plates 1' .9, carried by the lever-arms j m. As above described,the contact-plates carried by the arms kj and m n, with theirconnections, are those used primarily for the making and breaking of theoperating electric circuit, while the contactplates carried by the armsZ 0 and their connections are utilized in connection with the brakeforming a part of the Orocker-Wheeler compound-wound brake-motor. One ofthe posts 1 of the contact-posts t u'for the contact-plates o- 8 carriedby the lever-arm k is connected by the conductor m with the binding-postof the upper plate 0, andthe corresponding binding-post y of thecontactposts in for the plates 1- 3 carried by the lever-arm 'It isconnected by the conductor it with the binding-post of the middlecontactplate N of the switchboard M. One of the binding-posts 11 of thecontact-posts t u for the plates 0' .9 carried by the lever-arm m isconnected by the conductor 01 with the binding-post of the uppercontact-plate N of the switchboard M, and the corresponding binding-post1 of the contact-posts t u for the plates 0 8 carried by the lever-arm 7is connected by the conductor 0 with the bindingpost for the middlecontact-plate O of the switchboard M. The contact-posts t a for theplates 0* 5 carried by the lever-arms Z 0 are connected together by theconductor 1'), and this conductor is by the conductor q connected withthe controller, and the contact-posts t it of the plates 0" .5- carriedby the lever-arm 0 are by means of the conductor 7" connected with thelower contact-plate N of the switchboard M, while the contactposts '15 ufor the plates 1" 3 carried by the lever-arm Z are through the medium ofthe conductor .9 in electrical connection with the binding-post for thelower contact-plate O of the switchboard M. The upper plate Q, of theswitchboard M is by means of the conductor 75 connected with thecontroller. The middle plate Q, of the switchboard M is by means of theconductor a connected with the motor D, and from this conductor to aconductor w passes to the controller, and the lower plate Q of theswitchboard M is by means of the conductor w connected with the motor.The wiring shown in Fig. 4 is that which will be used when a controllerand a compound-wound motor are used, and when these devices are not usedthe wiring may be of the nature described in the Letters Patentheretofore granted to me and hereinbefore referred to by number.

Then the switch-arm T is in the neutral position illustrated in Fig. 4:,the contact spring-plates a b are not in electrical connection witheither the plates N or the plates 0, and hence the operating-circuitwill be broken and the elevator-carriage will necessarily come to a stopand the brake for the motor will be released, so as to apply itself tocheck the momentum of the revolving portion of the motor.

The actuating-arm K makes and breaks the circuits when the arm T andplates a Z) are through it moved toward and from the plates N O, and theshaft J, upon which said arm K is mounted, actuates the controller toreverse the current.

The automatic stopping of the elevator-carriage at the upper and lowerends of its line of travel is effected by the follower Q, in connectionwith the contacts and lever-arms 7.; Z and m n 0, with their cooperatingdevices present at the switchboards X Y. Vith the wiring illustratedwhen the elevator-carriage reaches the top of the elevator-shaft thefollower Q through its pin S will turn the shaft 0 outward, and therebyelevate the arms m n 0, which will break the circuit and cause theelevator-carriage to come to a full stop and the brake to be releasedfrom its magnet, the brake being thus permitted to check the momentum ofthe revolving portion of the motor. Upon the descentof theelevator-carriage the pin T on the followerQ, acting upon the plateF,will restore the shaft and its arms on n 0 to their former position,and upon the elevator-carriage reaching the lower end of theelevator-shaft the pin W' on the follower Q will turn the shaft 1) andarms j 7r, lupward and thereby break the circuit, causing theelevator-carriage to come to a full stop and the brake at the motor tobe released. Upon the next ascent of the elevator-carriage the pin V ofthe follower Q, acting upon the plate F, will restore the shaft 1) andarmsj Z to their former position, thus reestablishing the electricalconnection of the contacts carried by said armsj is l with thecontact-posts t u, as illustrated in Fig. 7.

In Fig. 10 I show in a diagrammatic view the controller, motor, andcircuits, these all being of the usual well-known form and arrangement.

The connections between the switches, controller, and motor areillustrated in Fig. 10, which diagrammatically shows the wiring for theseveral circuits. These circuits may be understood by a very briefdescription of Fig. 10. \Vhen the car is to ascend, the switch-arm Twill be moved toward the right and the controller E will be turnedtoward the right, and under such condition of the parts the circuit willbe from the main line-wire f, through the wire h and connecting-wire 70,to the switch on, thence through the wire at to the upper right-handcontact N and top plate a, and thence through the wire '6 to the contactNo. 1 of the controller. The shunt-field current is from contact No. lof the controller, through the body of the controller, to the contactNo. 6 thereof, thence through the conducting-wire q to theconnecting-wire p, thence through the switch 0 and conductingwire t"therefrom to the lower contact N and bottom switch-plate a, thencethrough the conducting-wire 5c, the left-hand shunt-field 40, theright-hand shunt-field 4:1, and the conducting-wire u to the middleswitch-plate a and middle contact N, and thence through theconductingvire n, the switch 9t, and conductorj to the wire 7," and mainline conductor g. The armature-current from the contact No. l of thecontroller E is through the body of the controller from said contact No.1 to the contact No. 2 of said controller, thence through the resistancedenoted by the characters 2 3 4: 5, and thence through theconducting-wire 42, the right-hand series field 43, the left-hand seriesfield 44, and the conductor l5 to the contact No. '7 of the 0011-troller, thence through the embedded conductor 46 to the contact No. 9of the controller, thence through the conduotor 47 to the lower brush 48of the commutator, thence through the armature to the top brush 49 ofthe commutator, then through the conductor 50 to the contact No. 8 ofthe controller, thence through the embedded conductor 51 of thecontroller to the contact No. 10 of the controller, thence through theconductor 10 and up through the conductor a to the middle switch-plate aand iniddle contact N, and thence through the wire it, the switch a, thewire j, and the wire i to the main linewire 9.

When it .is desired that the car shall descend, the switch-arm T ismoved to the left and the controller is turned to the left, and thecurrent starts from the main line-wire f and passes through theconductor h and connecting-conduetor 7a to the switch j, and thencepasses through the conductor 0 to the upper contact 0 and topswitch-plate a, and thence through the wire t to the contact No. l ofthe controller. The shunt-field current is from contact No. l of thecontroller, through the body of the controller, to the contact No. 6thereof, then through the conductor q and connecting-conductor p to thelower switch Z, thence through the wire 8 to the lower contact O andbottom switch plate a, then through the wire 00, the left-handshunt-field 40, the right-hand shunt-field 41, and the wire a to themiddle contact-plate a and middle contact 0, then through theconducting-Wire m to the switch is and then through the conduetorj' andwire a" to the main 1ine-wire g. The armature-current is from contactNo. 1 of the controller, through the body of the controller, to thecontact No. 2 of said controller, thence through the resistanceindicated by the characters 2 3 4 5', then through the conductor 42, theright-hand series field 43, the left-hand series field 44, and conductor45 to the contact No. 7 of the controller, thence through the controllerto the contact No. 8 thereof, then through the wire 50 to the upperbrush 49 of the commutator, then through the armature to the lower brush48 of the commutator, then through the conducting-wire 47 to. thecontact No. 9 of the controller, then through the controller fromcontact No.9 to the contact No. 10, thence through the wire to and upthrough the wire it to the middle switch-plate a and middle contact 0,then through the conductor m to the switch it and conductor j, andthence through the wire 71 to the main line-wire g.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. In electrical apparatus of the character described, the shafts b, c,carrying the arms j, 70, and m, n respectively, said arms being providedwith the contact-plates r, s in electrical connection with one another,combined with the contact-posts If, it, for said contactplates, meansfor turning said armsj, 7t and m, n, respectively, at the ends of thetravel of the elevator-carriage to break the circuits and then downwardon the reverse movement of the carriage to restore the circuits, andsuitable conductors forming the circuits; substantially as set forth.

2. In electrical apparatus of the character described, the shafts b, c,carrying respectively the arms j, and m, a, the said arms being providedwith the pairs of contactplates r, .9, combined with the contact-postsi, u, the lever-arms upon the ends of said shafts b, c, the threadedshaft P timed with the hoisting mechanism, the follower on said shaftand adapted to contact with said leverarms and elevate and depress thearms j, 7t and 777, n, respectively, at the ends of the travel of theelevator-carriage, and suitable conductors forming the circuitssubstantially as set forth.

In electrical apparatus of the character described, the shafts Z), c,carrying the arms upon which are secured the contact-plates, combinedwith the contacts 15, u, for electrical connection with said plates,suitable conductors forming the circuits, the lever-arms E secured uponthe ends of said shafts, the plates F also secured upon the ends of saidshafts, and the follower Q having the pairs of pins S, T andV, \V,respectively, for contact with said lever-arms and plates; substantiallyas set forth.

4. In electrical apparatus of the character described, the shafts Z), c,carrying respectively the armsj, 7t, and m, it, the pairs ofcontact-plates r, 3 carried by said arms and being in electricalconnection with one another, combined with the contact-posts 'l, u,adapted to pass between the said plates, the arms (Z, 6 respectivelyupon said shafts b, c, the rods f engaging said arms cl, 6, the springsupon said rods f, the arms L for limiting the movement of the said rodsf, and means substantially as described for turning said armsj, 7C andm, a respectively upward to break the circuit and then downward tocomplete the circuit at the ends of the travel of the elevator-carriage;substantially as set forth.

5. In electrical apparatus of the character described, the shafts b, c,and the armsj, 7:, and m, 02 thereon, said arms being provided with thecontact-plates r, s, in electrical connection with one another butinsulated from said arms, combined with the contacts 15, '11, forconnection with said contactplates, the bindingposts y having theshoulder and socket and connected with said contacts 15, it, means forturning said arms j, k and m, n, at the ends of the travel of theelevator-carriage to break the circuits and then to restore the circuitson the reverse movement of the carriage; substantially as set forth.

6. In electrical apparatus of the character described, the shafts Z), c,the arms j, k, and m, n, adjustably secured thereon, and the contacts 4,s, on-said arms, combined with the contacts 15, u for said contacts 1',s, and means for actuating said arms from the hoisting mechanism;substantially as set forth.

'7; In electrical apparatus of the character described, and incombination with the starting and stopping devices of an elevator, theframe V, the arm K adapted to be actuated by the said stoppin g andstarting devices and to have its movement within the said frame V, theswitch-arm T connected with said IIC frame and provided with the seriesof pairs of contact-plates a, b, the switchboard M, the series ofcontact-plates N, O, for cooperation with said contact-plates a, theplates Q upon which the said contact-plates I) move, and suitableconductors; substantially as and for the purposes set forth.

8. In electrical apparatus of the character described, the arm K adaptedto have an oscillatory motion from the starting and stopping devices,the frame V receiving said arm K and being of somewhat oval outline andhaving the central recess cl, and the switcharm T connected with saidframe, combined with the spring contact-plates d, I), carried by butinsulated from the said arm T, the switchboard M having the contacts N,O, and plates Q, and suitable conductors; substantially as and for thepurposes set forth.

9. In electrical apparatus of the character described the wheel Fadapted to be actuated from the stopping and starting devices in theelevator-carriage and mounted upon the shaft G, the pinion II also onsaid shaft, the gearwheel I engaging said pinion and mounted upon theshaft J, and the arm K mounted upon said shaft J, combined with thesliding switch-arm T adapted to be actuated from said arm K, a series ofpairs of contacts a, I), carried by but insulated from said switcharm T,the plates Q upon which the said contact-plates I) move, the contacts N,O, for electrical connection with said contacts a, and suitableconductors; substantiallyas and for the purposes set forth.

10. In electrical apparatus of the character described, the arm Kadapted to be actuated from the elevator-carriage, and the sliding framereceiving and adapted to be moved by said arm K, the guides fordirecting the said frame in its movement, the arm T connected with saidframe, the spring-contacts a, I), carried by but insulated from the saidarm T, the plates Q upon which said contacts 1) move, the contacts N, O,for electrical connection with said contacts a, and suitable conductors;substantially as and for the purposes set forth.

11. In electrical apparatus of the character described, the arm Kadapted to be moved from the elevator-carriage, the switch-arm T adaptedto be actuated from said arm K, the spring-contacts a, I), carried bysaid arm T, the plates Q upon which the contacts I) move, the contactsN, 0, adapted to receive said contacts a, and suitable conductors;substantially as and for the purposes set forth.

12. In electrical apparatus of the character described, the arm Kadapted to be actuated from the elevator-carriage, the switcharm Tadapted to be moved by said arm K, the spring-contacts a, I), carried bysaid arm T, the plates Q for electrical connection with said contactsI), the contact-plates N, O, for electrical connection with saidcontacts a, and suitable conductors and switches; substantially as andfor the purposes set forth.

13. In electrical apparatus of the character described, the switch-armT, and means for moving the same from the elevator-carriage, combinedwith the pairs of contacts a, (1, carried by but insulated from saidarm, the plates Q upon which the contacts 1) move, the contacts N, O, toreceive said contacts a, and suitable conductors and switches;substantially as and for the purposes set forth.

1%. In electrical apparatus of the character described, thecompound-wound brakemotor, the controller, the starting and stoppingswitch, and means for operating said switch and controller from theelevator-carriage, said switch having three sets of contacts for formingthe circuits at the ends of the movements of said switch, combined withthe pair of switches operated from the hoisting mechanism and eachhaving three pairs of contacts, and suitable conductors; substantiallyas and for the purposes set forth.

Signed at New York, in the county of New York and State of New York,this 26th day of November, A. D. 1895.

JAMES ll. ROBERTS.

Witnesses:

CHAS. C. GILL, E. Jos. BELKNAP.

